Clinical Research Directory

Inclusion Criteria: 1. Age between 18 and 80 years old. 2. Clinically diagnosed with primary lower extremity varicose veins, with CEAP grade C2 - C5, and requiring treatment of the great saphenous vein segment. 3. Doppler ultrasound confirms that the reflux time of the saphenofemoral vein valve is \> 1.0 second. 4. Doppler ultrasound confirms that the diameter of the great saphenous vein in the supine position is \> 3mm and \< 12mm. 5. Only one limb of each patient is included in the study. 6. The patient signs the informed consent form and is willing to cooperate with the examinations and follow - ups specified in the protocol. Exclusion Criteria: 1. Thrombosis in the great saphenous vein, or combined with deep vein thrombosis, or a history of deep vein thrombosis or pulmonary embolism. 2. Recurrent varicose veins after previous treatment. 3. Severe tortuosity of the great saphenous vein, with the expectation that the catheter cannot pass through. 4. Severe lower extremity ischemia (CLI). 5. Known allergy to drugs or device materials involved in the study. 6. History of cardiac pacemaker or defibrillator implantation. 7. Pregnant or breastfeeding women. 8. Currently participating in other drug or device studies. 9. Deemed unsuitable for endovenous treatment by the researcher.